Gas-valve.



A. S. LINDKWIST.

GAS VALVE.

APPLICATION FILED JAN. 9, 1909.

Patented Jan. l18, 1910.

p Tim attenua? ABEL s. LINDKWIsfr, 0F srnINcDALE, PENNSYLVANIA.

eas-VALVE. f

specification of Letters raient.

Patented Jan. 18, 1910.

Application led January 9, 1909; Serial No. 471,460.

To all whom it may concern:

Be it known that I, ABEL S. LINDKwIsr, a subject of the King of Sweden, residing at Springdale, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Gas- Valves, of which the following is a specilication, reference being had therein to the accompanying drawing.

This invention relates to gas valves, and the objects of my invention are, first, tol pro vide positive and reliable means in connection with a valve for automatically closing the same, should the back pressure of the gas line be reduced; second, to provide a valve that can be advantageously used in connection with the supply pipe of` a stove for closing the gas supply when the connecting pipe or hose of the stove bursts; and third, toy provide a simple, durable and inexpensive valve that will prevent the escape of gas and the asphyXiation of persons when a hose accidentally bursts or becomes disconnected.

I attain the above objects by a valve, the automatic action of which entirely depends upon the back pressure of gas within a pipe or hose, while the valve can be positively controlled by manual operation.

Referring to the drawings, Figure 1 is an elevation of a valve constructedkin accordance with my invention, Fig. 2 is a vertical sectional view of a valve, Fig. 3 is an en-` larged cross sectional view of a valve taken on the line X-X of Fig. 2 looking inthe direction of the arrow of said figure, Fig. 4 is a similar view taken on the line W-W of Fig.

2 looking in the direction of the same arrow, and Fig. 5 is an elevation of a modied form of valve.

In the accompanying drawings, l designates a gas supply pipe to which is attached an elbow 2 having an integral valve body 8" provided with a stepped nipple 4, to which is attached the end of a llexible hose or pipe 5 adapted to connect with the valvey 6 controlling the supply of gas to a stove 7, or a similar structure. I

In the valve body 3 is located a rotatable plug 8 controlling the passage of gas from the elbow 2 to the nipple 4, and the valve 6' is similarly constructed, this construction and well known typev being of the ordinary common to gas valves.

In the nipple 4 is located a horizontal parftition 9 having openings 10 formed therein and ai Aseat 1v1 for a spherical valve or ball 12. Detachably mounted in the upper end infthe hose or pipe 5 retains the vvalve :12

upon the seat 11 of the .partition 9, allowing gas to pass around the valve 12, but, when l the back `pressure is released, by the bursting ofthe hose or pipe 5, or by said hose or pipe becoming accidentally detached, vthe pressure ol" the gas forces the valve 12 up wardly upon the seat 14 and shuts olf the supply of gas to the hose or pipe 5f.

In Fig. 5 of the drawings I have illustrated a slight modification of my invention, wherein the valve body 3 is provided with a `straight connection 15, in lieu of the elbow connection 2, as it is essential to obtain a positive operation ol:` the valve, that said'y valvebe retained in ya vertical position While in the drawings forming a part of this application there is illustrated, the preferred embodiments of my invention, I wouldhave it understood that the details of construction can be varied or changed as to the shape, proportion and manner of assemblagewithoutdeparting from the spirit of the invention.

I-Iavingnow described my invention, what I claim as new, 1s:-

In combination, an elbow adapted to communicate at one terminus with a gassupply, a plug casing formed integral with the other terminus of said elbow and extending transversely with respect thereto, a vplug mounted 'in saidy casing for controlling the passage of gas from the elbow, axnipple formed integral` and communicating with said plug casing and disposed at right angles y with respect to said casing, a partition locatedl in said nipple at a point removed from its lower end and provided with openings In testimony whereof I nix my signature mld1 further having a oenprally displosed in the presence of two Witnesses.

so ic ortion consttutinfr va ve seat, a s eeve T v inounled in the upper enzd of said nipple and ABEL b LIB DKVVIS l" having its inner end beveled to constitute a ft-nesses: valve seat, and a valve Within said nipple EDW. EGKSTROM, and interposed between the said valve seats. MAX H. SRoLovrrz. 

